Intermolecular C–H activation by reactive titanocene alkylidene intermediates

Intermolecular C–H activation by reactive titanocene alkylidene intermediates
复制标题

反应性二茂钛亚烷基中间体的分子间 C-H 活化

DOI:
--
复制
发表时间:
1995
期刊:
影响因子:
--
通讯作者:
B. Hessen
B. Hessen
中科院分区:
--
文献类型:
--
作者:
Harry van der Heijden;B. Hessen

文献摘要

被引文献

相似文献

(C_5H_4R)_2Ti(CH_2CMe_3)_2的热α-H抽提(R = H,Me)在温和条件下生成反应性的茂钛新戊叉中间体,该中间体可以被PMe 3捕获以生成烷叉络合物(C5 H4 R)2 Ti(CHCMe 3)PMe 3,或者添加烃底物R′H的C-H键(R′H =苯,对二甲苯)与TiC双键反应生成(C5 H4 R)2 Ti(CH 2CMe 3)R′;在THF存在下观察到另一种反应途径,将烷叉部分插入到C4 C-C键中。
Thermal α-H abstraction from (C5H4R)2Ti(CH2CMe3)2(R = H, Me) produces reactive titanocene neopentylidene intermediates under mild conditions, that can either be trapped with PMe3 to yield the alkylidene complexes (C5H4R)2Ti(CHCMe3)PMe3, or add C–H bonds of hydrocarbon substrates R′H (R′H = benzene, p-xylene) to the TiC double bond to produce (C5H4R)2Ti(CH2CMe3)R′; an alternative reaction pathway, insertion of the alkylidene moiety into the cyclopentadienyl C–C bond, has been observed in the presence of THF.